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AMPHOS DC MANUAL
© 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
CARE AND CLEANING
Protect your AMPHOS from shock, excessive temperatures, exposure to chemicals, and tampering. Protect the lens against
scratches with a Instrument Lens Protector. Small scratches will naturally disappear underwater.
• Soak and rinse the AMPHOS in fresh water at the end of each day of diving, and check to ensure that the areas around the
Low Pressure (Depth) Sensor (Fig. 114a), PC Interface Data Port (Fig. 114b), and Buttons are free of debris or obstructions.
• To dissolve salt crystals, use lukewarm water or a slightly acidic bath (50% white vinegar/50% fresh water). After removal
from the bath, place the AMPHOS under gently running water and towel dry before storing.
• Transport your AMPHOS system cool, dry, and protected.
INSPECTIONS AND SERVICE
Your AMPHOS should be inspected annually by an Authorized Sherwood Dealer who will perform a factory prescribed function
check and inspection for damage or wear. To keep the 2 year limited warranty in effect, this inspection must be completed one
year after purchase (+/- 30 days).
Sherwood recommends that you continue to have an inspection performed every year to ensure it is working properly. The costs
of annual inspections are not covered under the terms of the 2 year limited warranty.
To Obtain Service:
Take your AMPHOS to an Authorized Sherwood Dealer.
AMPHOS BATTERY REPLACEMENT
NOTE: The procedures that follow must be closely adhered to. Damage due to improper Battery re-
placement is not covered by the product's warranty.
The Battery Compartment should only be opened in a dry and clean environment with extreme care taken to prevent the entrance
of moisture or dust.
As an additional precautionary measure, to prevent formation of moisture in the Battery Compartment, it is recommended that the
Battery be changed in an environment equivalent to the local outdoor temperature and humidity (e.g., do not change the Battery
in an air conditioned environment then take it outside during a hot sunny day).
Inspect the Buttons, Lens, and Housing to ensure they are not cracked or damaged. If there is any sign of moisture in the AM-
PHOS, DO NOT attempt to use it for diving (NORM, GAUG, or FREE) until it receives proper factory service by Sherwood.
NOTE: When the old battery is removed, settings and calculations for repetitive dives will be retained
in non volatile memory for subsequent operations.
CAUTION: Damage due to improper Battery replacement is not covered by the product's warranty.
Battery Removal
• Locate the Battery Compartment on the back of the unit.
• Rotate the Battery Cover clockwise 10 degrees using the special Battery Cover Tool provided (Fig. 115), or -
by pushing the lower portion to the left while pushing the upper portion to the right using your fingers (Fig. 116).
• Lift the Cover with O-ring up and away from the Housing.
• Using care not to damage the Battery Contact (Fig. 117a), slide the Battery up and out of the left side of the Battery
Compartment.
• Discard the Battery according to local regulations governing disposal of Lithium batteries.
CAUTION: DO NOT allow a metal object to short circuit the top of the Battery which is positive (+) to
the negative ( - ) contact of the Battery Compartment.
Inspection
• Closely check all of the sealing surfaces for any signs of damage that might impair proper sealing.
• Inspect the Buttons, Lens, and Housing to ensure they are not cracked or damaged.
• Remove the Battery Cover O-ring and inspect it for any signs of deterioration or deformity. DO NOT use tools to remove the
O-ring.
• To ensure proper sealing, O-ring replacement is highly recommended each time a Battery is replaced.
• Closely examine the Battery Cover and Housing for any signs of damage that might prevent proper sealing.
• Closely examine the inside of the Battery Compartment for any signs of corrosion indicating entrance of moisture into the
unit.
WARNING: If damage or corrosion is found, return your AMPHOS to an Authorized Sherwood Dealer,
and DO NOT attempt to use it until it has received factory prescribed service.
Battery Installation
• Slide a new 3 volt type CR2430 Lithium Battery, negative side down into the cavity of the compartment. Slide it in from the
left side (Fig. 118) and ensure that it slides under the contact clip on the lower/right rim of the cavity.
• Lightly lubricate the new Cover O-ring with silicone grease and place it on the inner rim of the Battery Cover. Ensure that it
is evenly seated (Fig. 119).
Fig. 114 - CASE BACK
b
a
Fig. 115 - BATTERY COVER
REMOVAL (Tool)
Fig. 116 - ALTERNATE
COVER REMOVAL
Fig. 117 - AMPHOS BAT-
TERY REMOVAL
a
Fig. 118 - BATTERY
INSTALLATION
Fig. 119 - COVER O-RING